Core-cutting machine



Sept. 5, 1950 A. G. MARIoN 2,521,385 v CORE CUTTINGMACHINE Filed June 28, v1946 5 Sheets-Sheet -1 /W 44am/rmi@ 7000/1 Sept 5 1950 A.l G. MARION v 2,521,385

CORE CUTTING MACHINE Filed June i128,v 1946 5 Sheets-Sheet 2 rrr-armer 3 Sheets-Sheet 3 Filed June 28, 1946 .P .s Pm f a vf e www 9. if@ Ml l .d 0 I. i i, f/ 04./ w www /f |l ww 7 f f f, W Lw. u l

Patented Sept. 5, 1950 y' Ulirrrsl)v STATES aszisss CORE-CUTTING MACHINE Alexander G. Marion,

signor to Keystone Engineering Company,

River Rouge, Mich., as-

River Rouge, Mich., a corporation of Michigan Application June 28, 1946, Serial No. 680,299

Claims.

My invention relates to a new and useful improvement in a core cutting machine adapted for use in cutting tubular bodies into predetermined lengths. The invention is particularly adapted for cutting paper or cardboard tubes into desired lengths.

Machines are now used for cutting such tubular bodies into desired lengths and one disadvantage of these machines is that when cutting paper or cardboard tubes, a ragged edge is obtained. It is an object of the presentinvention to provide a machine so" constructed and arranged that this ragged edge will be eliminated and be clean cut at the ends effected. Another object of the invention is the provision of a machine so constructed and arranged as to be most efficient in action and speedy in operation.

Another object of the invention is the provision in a machine of this class of a mechanism whereby the cutting element may be movedinto cutting and non-cutting position'and kwhen the cutting element is moved to cutting position, the mandrel on which the tubeto' be cut is positioned will be rotated andv automatically stopped whenthe cutting Velement is moved to noncutting position. 1 l

Another object of the invention is the provision of a mandrel support swingable into supporting position and non-supporting position and swingableinto supporting position upon movement of the cutting element tolcutting position. Another object of the invention is the provision in a machine of this class of adjustable stops which vmay be set at various positions so as to quickly determinethe length of the tube to be cut. Y

Another object of the invention isV the provision of means for gripping the tube on the mandrel so that it is positively driven during ther cutting operation. I y

Another object of the invention is the :provision in a machine of this class of a cutting'elei ment and a guard mechanism therefor and means for moving said vguard m'echanism'to guarding and non-'guarding position. l

Another object of the invention is the provi-v sion in a machine of this class of a carriage which is slidable longitudinally thereof vand serves-to carry the cutting element.

Another object of the invention is theprovig sion of a supporting mandrel so arranged and` constructed that when the cutting element severs the tube operated upon the cuttingelement" will not be dulled or damaged and no'permanent figli am..

. 2 scoring or marking will be effected on 'the sup-f' porting mandrel. .1

"Other objects will appear hereinafter. U It is recognized that various modications 'and' gti changes may be made 'in theA detail of structure; illustrated without departing from the invention' itself and it is intended that such shall befem-f braced within the scope ofthe claims which form` a part hereof. f6: Forming a part of' this application are 'drawings in which, Fig. 1 is a topplan View of the invention,

Fig.` 2 is a front elevational view 'ofthe' inl; vention, 1j y i fgj Fig. 3 is a sectional view taken onlineS-fi of l Fig. 2, with parts broken awayand parts'shojwn'j in side elevation,V j Fig. 4` is a fragmentary sectional view taken' on1ine4-4ofFig.3," v, v Fig. 5 is a sectional view taken on line 5-5vof:

` Fig. 6 is a view taken on line shown in fragment, Y Fig. 7 is a fragmentary view taken on line Q1 1f of Fig.' 3,

4Fig. 8 is anA enlarged fragmentary side elevational Vview kof the plunger actuating 4VmechaniSm. j i f'f, Y Fig'. 9 is a fragmentary sectional View ltaken onf" line 9--9 of Fig.A 3, Fig. 10 is a fragmentary lsectional viewtaken"V online lll-I0 of Figl, l d Fig.l1 is an enlarged'fragmentary sideelelv -1 tional view of the mandrel centering vmechanis f, with' parts broken away and parts ,slicve'mfvinll section, 1 n Fig. l2 is a fragmentary sectional view,taken.'y

on line |2-I2 of Fig. l1, l

Fig. 13 is a fragmentary view taken .on li lsf-lsofr'ig. 12,A f i `Fig.,11.1. is a viewtaken on line Ill-'I4 oftFigfZ," Fig. l5 is a fragmentary sectional View,'taken'f` online I5-I5 of Fig. 2,N n

Fig. 16 is a'sectional view of Fig. 15, y

"Fig. 17 is a diagrammatic taken on linie used in the invention. y .V

As shown in the drawings, the invention 'com-. prises a'pair'of spaced apart supporting meribers'" 24 on which Vis mounted the supportingstruc'turefv View ofthe embodying the bottom 25 and the upwardl jecting supports 26,I 21 and 28'on which .15.90. Y, tioned a bed 29. Projecting outwardly'fr'om'the'f support 24 is a bracket 3l!` onwhich issupporta,i an electric' motor 3|` adapted 'for rotating' the such that when a tube is placed upon the mandrel so as to overlie the gripping member 40, independent rotation of the mandrel relatively to the tube will be prevented and the tube will be forced to rotate in unison with the mandrel. Embracing the tubular shaft 36 is a ring |39 of suitable bearing material such as bronze or the like and which is keyed in position on the shaftV or tube 36 by the means of the pin |38. Embracing this ring |39 is a presser ring 42 which is slidable longitudinally of the shaft 36. This member 42 is provided with a peripheral groove 43 intowhich projects the trunnions 44 which project outwardly from the arms 45 and 46 of the yoke, the'tree 41 of which is secured by the bolt 40 to the flange 49 which projects downwardly along the edge of the bed 29. The construction is such when it is desiredv to remove the tube from the mandrel a rocking of the yoke will effect a slidable movement of the presser ring 42 and force the tube olf the gripping members 40. Extending upwardly from bed 29 are bearings |03 and |04 journaled in which is a shaft 50. `The carriage 52 is slidably mounted on the shaft 50 and as shown in Fig. 4, this shaft is provided with alongitudinally extending key-way 5| in which fits the key 53 so that the carriage52, While slidable longitudinally of the shaft 5'cannot rotate relatively to the shaft 50,`the key 53 being carried by the carriage 52. Projecting outwardly from the carriage 52 isa flange 54 through which the lug 55, which extends downwardly from the housing 51, is secure by means of the bolt 56. As shown in Fig. 3, the studs 58 and 59 which are threaded through the lugs 6| and 60 respectively projecting outwardly from the lflange 54, engage opposite sides ofthe member 55 so as to prevent pivoting of the housing on the bolt 56 as a pivot. A front cover (i2V is mounted on the wall 63 of the housing and projecting upwardly from this housing is a handle 65., having a gripping member 64 extending outwardly therefrom. Projecting centrally through the rear wall of the housing 51 is a bolt the numeral 66 which extends through the bushing 61. This bushing S1 is ,l

provided with the outwardly projecting flange 58 at the one end. Mounted on this bushing 61 is a cutting blade 69 which is4 circular in formation and which is positioned between the presser plates 1| and 12 which are clamped against the blade 69 by the means of the nut 12A so that when the blade 69 rotates the bushing 51 will also rotate. The guard member is provided for the cutting blade or disc'69' andcomprises. the

back plate 13 having thezradially directed flange l,

14 projecting therefrom. The wall 63 of the housing is cut away as at |64 as clearly shown in Fig. 3. Formed on rthe side wall 630i the housing is a shoulder 15 against which bears one end of a coil spring 16, the other end bearing 'i against a shoulder 18 formed on the radially di rected portion 14 of the shield or guard. `The construction is such that when the operator pulls forwardly on the handle 65 the housing will rock into the dotted line position shown in Fig,

3, and in this movement the shaft 50 will also be rocked. The mandrel will be rotating in the direction of the arrow shown in Fig. 3, and when this mandrel is brought into contact with the outer surface of the guard 14 the guard 14 will slide against the compression of the spring 16 so as to clear the opening |64 and permit a tube on the mandrel to contact the periphery of the cutting disc or blade 69.

Projecting upwardly from the rear side of the bed 29 is a wall 19 on which are slidably mounted the stops which may be secured in various positions of longitudinal movement on the wall 19 by means of the set screws.

As shown in Fig. 4, a sleeve 8| is rockably mounted on the reduced extension 84 of the carriage 52. The sleeve 8| is retained in position by the nut 83 pressing against the washer 82,. The sleeve 8| is provided with the extension 86. In this extension 86 is formed a recess 89 in which is slidably mounted a plunger 91 normally pressed outwardly by the spring 88 to engage the upper face of the bed 29. Formed in this extension 86 is a passage 90 inwhich is slidably mounted a latch member 9| pressed upwardly by the spring 9|a, as shown in Fig. 9. Formed in the extension 86 is a slot 92 communieating with a recess 90 and projecting outwardly from the latch member or plunger 9| is a pin 93 which engages in the slot 92. A releasing lever or handle 94 is pivotally mounted on the extension 86 and provided with a nose 95 adapted to engage the pivotally mounted latch plate 96 as shown in Fig. 3 and Fig. 8. The latch u plate is provided with a tongue 91 which is adapted to engage the projecting portion of the pin 93. The construction is such that when the stop members 80I are mounted in the desir-ediposition on the wall 19 the carriage 52 may be freely slid in one direction and as the beveled end of the plunger 9| engages the stop 92 the plunger 9| willbe pressed inwardly against the compression of the spring 9|a. The plunger 9i will resist an attempted sliding movement of the carriage in the opposite direction. After the tube has been placed on the mandrel and the stops 80 have been properly located, the operator may slide thecarriage 52 until the plunger 9| clicks under one of the stops 86' whereupon the carriage is slid. in the opposite directionto bring the flat face of the'plunger 9| into engagement with the stops, thus denitely fixing the position of the carriage relatively.A to the mandrel. Projecting outwardly from oneend of the lcarriage 52 is a pointer 85-fwhich4 cooperates with the graduation |9| formed on the upper face of the wall 99 which projects upwardly from the bed 29. This pointer and these graduations may be used for determining the locationof the carriage bei fore the cutting operation is performed or may be used in order to determine the location of the stop 80. When the operator desires to move the carriage inthe oppositedirection the plunger 9| may be moved downwardly byy pressing down- 5 wardly on the lever 94 which will cause the nose 95 to ride over the. inclined surface and force the tongue 91 downwardly carrying the pin 93 with it.

A shaft 50 is journaled in the bearings |93 and |04 and extends beyond the bearing |04. At the opposite side of the bed the shaft is journaled in the bearing |05 as shown in Fig. 13. Fixedly mounted on the shaft 50 is the pulley |09 connected by the endless belt |01 with the pulley 75 |08 which is fixedly mounted on the shaft |139 abaisse.

shaft I I3 is a disc I I5. The shaft I |3 also projects through the head H6 projecting outwardly from which is an arm II1, the head H6 being rotatably mounted on the shaft I I3. As shown in Fig. 11 the arm H1 carries a supporting boss H8 v adapted to engage in the bearing I I9 mounted in the end of the shaft or mandrel 36. Formed in the disc I I6 is an arcuate slot |20into which projects a pin |2| carried by the disc H5. The coil spring |22 which embraces the shaft H3 is fastened at one end to the disc H and at the opposite end to the head H6. The construction is such that the spring |22 tends to normally swing the arm H1 from the dotted line position shown in Fig. 11, toward the full line position shown in Fig. 11. When the operator moves the cutting disc shown in Fig. 3 from the full line position toward the dotted line position, the shaft 50 will, of course, be rocked. This will effect `a rocking of the shaft H3. The spring |22 will normally retain the arm ||1 rocked upwardly until the pin |2| engages the lower end of the arcuate slot |y shown in Fig. l1. When the shaft 5|] is rocked to effect a rocking of the shaft H3 the pin will travel upwardly thus permitting the spring |22 to further function to move the arm ||1 toward the bearing H9 and as the rocking of the shaft H3 is ended, the pin I2! will engage the other end of the slot |20 as shown in Fig. ll, to securely hold the arm H1 in position. Consequently, as .the cutting disc is moved downwardly from the full line position shown in Fig. 3, toward the dotted line position, the mandrel centering mechanism will have moved into the full line position shown in Fig. 1l. It remains in this position during the cutting operation. When the cutting disc is cut through the tube which has been placed upon the mandrel and the operator raises the cutting disc preparatory to sliding it along the shaft 59 to effect another cutting operation, the arm H1 will not be disturbed as the pin I2| will not have reached the lower end of the slot |20. Consequently, the slot |20 is made of sufcient length to permit this movement without effecting a movement of the head I I6. When the operator has finished the cutting operations he will move the cutting disc from the dotted line position shown in Fig. 3, to the full line position and this will effect a reverse rotation of the shaft I3 suiciently to move the arm H1 into the dotted line position so that the arm I I1 is moved to clear the mandrel and permit the tube placed thereon to be removed.

As shown in Fig. l, a pulley |23 is fixedly mounted on the shaft 50 and connected by the endless belt |24 to drive the pulley |25 which is iixedly mounted on the switch operating shaft |26 which is intended to operate the switch in the housing |21. The shaft |26 carries the contact member |28 which, when rocked in one direction, is brought into engagement with a contact member |29 to close the circuit to the motor 3|. The construction is such that the shaft |26 will not have rocked to a position sufficientl to close the circuit until the centering and supporting boss H8 carried by the arm H1 has moved t0 the position shown in full lines in Fig. 11.

The construction is such therefore, that when the cutting element has been moved to the full line position shownv in Fig. 3, and the tubepref viously placed on the mandrel removed from the gripping members d, the cut portion of the tube may be moved from the mandrel as the mandrel ywill rbe stationary. A new tube may then be placed upon the mandrel and shoved into position to overlie and be engaged by the gripping members 40. The machine isv then ready for operation and as the cutting element moves downwardly from the full line positionv shown in Fig. 3, to effect the cutting operation, a mandrel supporting or centering mechanism moves` into position and then the circuit to the motor 3| isv closed to rotate the shaft 36 for effecting a rotation of the tube to be cut. As the guard platev 14 comes into contact with the tube it is krotated clockwise from the position shown in Fig. 6 against the compression of the spring 16 to expose the cutting element at the opening |64. The

cutting element must, ol. course, be maintainedl sharp and it is desired that this blade or disc be used from as thin stock as possible. When the` cutting element or blade 69 is brought into engagement with the rotating tube which has'been placed upon the mandrel it will, of course, ro-A will yield under the cutting element or disc 69` suflicient to provide the necessaryl clearance for` the edge. The operator will know from experience when thecutting element or blade 69 has severed the tube being out so that further movement into the covering, which might cause a severing of the covering, would not be effected.

Experience has also shown that the machine isv highly eflicient in use as it aifords a clean cut on a cardboard or paper tube without'any ragged edges and because of its construction makes it possible for a single operator toconsiderably increase the number of cutsmade over that which is used on conventional machines today.

What I claim as new is:

1. In a tube cutting machine of the classdescribed: a rotatable mandrel for supporting a tube to be cut which may be placed thereon; a rotatable cutting member movable into and out of engagement with said tube; a guard plate or covering on the cutting edge of said cutting element and movable into engagement with the tube to be cut, said guard plate being movableinto non-guarding position upon engagement with a rotating tube. I

2. In a tube cutting machine of the class olescribed: a mandrel for supporting a tube placed thereon to be cut into sections; a rotatable cutting member movable into cutting and non-cutting position; means for rotating said mandrel and effecting a rotation of said tube; a guard .plate for covering said cutting elementand movable into non-guarding position upon engagement with arotating tube, said guard plate being positioned relatively to said cutting element for engagement with said tube prior to the movement of said cutting element into cutting position.

3. In a tube cutting machine of the class` described: a rotatable mandrel adapted for reception of a tube to be cut into sections and placed thereon; means for. rotating said mandrel; an

electricrmotor for operating said' rotating means; a cutting element movable into cutting and noncutting positions and the means operable, upon movement of said cuttingelement a predetermined distance, from non-cutting position to cutting position, for closing the circuit to said motor.

4. In a tube cutting machine of the class described.: a rotatable mandrel adapted for reception of a tube to be cut into sections and placed thereon; means for rotating saidmand-rel; an electric motor for operating said rotating means; a cutting element movable into cutting and noncutting positions andthe means operable, upon movement of said cutting element a predetermined distance, from non-cutting positionhto cutting position, for closing the circuit to-said motor, and operable upon movement of said cutting element' a pre-determined distance from cutting position toward non-cutting position for breaking the circuit to said motor.

5. In a tube cutting machine of the class described: a tube receiving mandrel for reception of a tube which may be placed thereon for cutting operation; means for supporting said mandrel at one end; means for rotating said mandrel; an electric motor for operating said rotating means; a movable member for engaging the iree end of said mandrel and supporting and centeringl the same; a cutting element movable into operative and inoperative position; means operable upon movement of said cutting element a predetermined distance from inoperative toward operative position for moving said supporting means into engagement with said mandrel; and means for closing the circuit to said motor upon movement of 'said cutting element toward operative position subsequent to the movement of said supporting and centering means into engagement With said mandrel.

6. Ina tube cutting machine of the class described: a tubel receiving mandrel for reception of a tube whichv may be placed thereon for cutting operation; means for supporting said mandrel at one end; means for rotating said mandrel; an electric motor for operating said rotating means; a movable member for engaging the free end of said mandrel and supporting and centering the same; a cutting element movable into operative and inoperative position; meansl operable upon movement of said cutting element a predetermined distance from inoperative towad operative position for moving said supporting means into engagement with said mandrel; meansfor closing the circuit to said motor upon movement of said cutting element toward operative position subsequent t the movement of said supporting and centering means into engagementvwith said mandrel, and operative for breaking the circuit to the motor upon movement of said cutting element a predetermined distance from operative toward inoperative position; and means operative subsequent to the breaking of said circuit for moving said supporting member out of engagement with said mandrel.

7. In a tube cutting machine of the class described: a rotatable mandrel for reception of a tube placed thereon tobe cut into sections; means for' supporting said mandrel adjacent one end; a movable supporting member for engaging and supporting the opposite end of said mandrel and movable into supporting and non-supporting positicns; a carriage slidable of said mandrel 1ongitudinall'y thereof; means for supporting said carriage; a cutting element carried by said carriage and movable into operative and inoperative lll positions, saidl supporting member being rockable upon movement of said cutting element from one position to the other means for effecting a movementv of said supporting means to supporting position upon rocking of said supporting means on which said Slide is mounted in one direction.

8. In a tube cutting machine of the class described: a rockably mounted elongated supporting member; a carriage slidably mounted on said supporting member and rockable in unison therewith; a rotatable mandrel for reception of a tube placed thereon to be cut into sections; an electric motor for rotating said mandrel; and means operable for, upon rocking of said carriage in either direction for making or breaking the circuit to said motor.

9. In a tube cutting machine of the class described: an elongated rockable supporting rod; a carriage slidably mounted on and rockable in unison with said rod; a rotatable mandrel eX- tending parallel and in spaced relation to said rod for reception of a tube to be placed thereon for cutting into sections; means for supporting said mandrel adjacent one end; a movable engaging member for engaging the free end of said mandrel and supporting the same and movable into' engaging and non-engaging positions; and' the means operable upon the rocking of said rod in one direction for moving said engaging means toward engaging position.

lo. In a tube cutting machine of the class described: an elongated rockable supporting rod; a carriage slidably mounted on and rockable in unison with said rod; a rotatable mandrel eX- tending parallel and in spaced relation to said rod for reception of a tube to be placed thereon for cutting into sections; means for supporting said mandrel adjacent one end; a movable engaging member for engaging the free end of said mandrel and supporting the same and movable into engaging and non-engaging positions; and the means operable upon the rocking of said rod in one direction for moving said engaging means toward engaging position; and means for retainfing said engaging means in engaged position.

ll. In a tube cutting machine of the class described: an elongated rockable supporting rod; a carriage slidably mounted on and roclrable in unison with said rod; a rotatable mandrel extend- ?ing parallel and in spaced relation to said rod for reception of a tube to be placed thereon for cutting into sections; means for supporting said mandrel adjacent one end; a movable engaging member for engaging the free end of said mandrel and supporting the same and movable into engagin. V and non-engaging positions; and the means operable upon the rocking of said rod in one direction for moving said engaging means toward engaging position; and means for retaining engaging means in engaged position; and means for movingv said engaging means to non-engaging position upon rocking of said rod a predetermined distance in the opposite direction.

12. In a tube cutting machine of the class described: a rotatable mandrel adapted for reception of a tube placed thereon to be out into sections; a supporting rod extending parallel and in spaced relation to. said mandrel; a stop supporting member extending parallel and in spaced relation. to said rod; a plurality of stops adjustably mounted on said stop supporting member;rv a carriage slidably mounted on said rod; a cutting element carried by said carriage and Inov-` able into position for' cutting a tube on said 9 A mandrel; and means on said carriage for engag ing said stops and determining the position of cut of said tube on said mandrel.

13. In a tube cutting machine of the class described: a rotatable mandrel adapted for recep- ,tion of a tube placed thereon to be cut into secgaging means to inoperative position for permitting free slidable movement Hof said carriage lon said rod.

14. In a tube cutting machine of the class described: a rotatable mandrel adapted for reception of a tube placed thereon to be out into sections; a supporting rod extending parallel and in spaced relation to said mandrel; a stop supporting member extending parallel to and in spaced relation to said supporting rod; a plurality lof stops adjustably mounted on said stop supporting member and movable to various positions thereon; a carriage -slidably mounted on said rod;v a cutting element carried by said carriage and movable into position for cutting'a tube placed on said mandrel; a latch mechanism engageable with said stops upon sliding of said carriage on said rod in one direction and movable, upon engagement with said stops, into inoperative position and adapted, upon movement of said carriage in the opposite direction, for engaging said stops and preventing slidingmovement of said carriage in said direction rfor de- 10 termining the location of cuts ona tube on said mandrel. g

15. In a tube cutting machine ofthe class described: a lrotatable mandrel adapted for reception of a tube placed thereon to be out into sectionsa supporting rod extending parallel and in spaced relation tosaid mandrel; a stop supporting member extending parallel to and in' spaced relation to vsaid supporting rod; a plurality of stops adjustably mounted on said stop supporti ing member and movable to various positions thereon; a carriage slidably mounted on said rod; a cutting element carried by saidA carriage and movable intoy position for cutting a tube placed with said stops upon sliding of saidv carriage ony said rod in one direction and movable, lupon env gagement with said stops, into inoperative position and adapted, upon movement of said carriage-in the oppositedirection, for engaging said i on said mandrelya latch mechanism engageable stops and preventing sliding movement of said carriage in said direction for determining the 1o'-` cation of `cuts on a tube on said mandrel; and

means for releasing said latch mechanism at will for the'moving of said carriage in either direc tion.

ALEXANDER G. MARION.

REFERENCES CITED The following references are of record in the le of this patent: i

UNITED STATES PATENTS Forsberg Apr. 23, 1946 

